Trust me, the Camaro will have 400 BHP available in the SS model...
- "Base" V6: 240-260 BHP 3.9L OHV V6 or 3.6L DOHC Direct Injection V6
- Z/28: 367 BHP L79 V8 with AFM and E85 capability
- SS: 400 BHP LS2, possible AFM addition in the works
- ZL1: 505 BHP LS7
---
Over the years the Camaro has always been a step behind the Corvette in power, and occasionally more powerful depending on what year/engine combo we are talking about. In the early years, you could order your Camaro with a more powerful engine that most Corvette owners would, and comparitively speaking, the '69 COPO SS had a few more ponies that the similarly equipped Corvette of the time.
...By today's standards, it wouldn't matter. With the "Blue Devil" in the works (as it has been confirmed) there isn't any need to worry about a 505 BHP ZL1 model, as there will be a Corvette to top it, but even when the Camaro goes for the 400 BHP LS2, the extra weight of the Camaro (a few hundred less than the rough 4K LBS of the Commodore) should negate most of the performance similarities that you are worried about.
...Guestimates for performance?
I'd peg the next-gen Camaro SS at about the same level as a C5 Z51, or about the same as the GT500, while the Z/28 will be shooting it out with the Shelby GT on price, the Camaro probably with stronger performance.